The O³ Copper is the only racquet to include Power Ring inserts for ultimate customization. It also features Power Plugs, a completely unique patent pending method of customizing the performance of your O³ racquet by increasing power and control.
The power level for the O³ Copper racquet can range from 3300-3500 depending on the placement of the Power Plugs at the top of the frame and the Power Rings in the throat.

Power Rings: The addition of interchangeable Power Ring Inserts allows you to further customize the power and control of your racquet. The DPR Insert, installed by the factory, extends the main strings to maximize length providing ultimate power. A Power 8 Ring Insert is included and when installed provides extra control and longer string life. These interchangeable throat pieces allow the racquet to be strung 4 different ways for maximum power or control and added string life.

Power Plugs: The addition of Power Plugs to your O³ racquet can change the swing weight and stability of the frame, resulting in greater overall power potential and reduced torque which improves power and control on off-center hits. Power Plugs are designed to be used in the O Ports at the top of the racquet frame only! Inserting Plugs in two O-Ports at the top of the frame will increase the power level by +100. Inserting the Plugs into all four O-Ports at the top of the frame will increase the power level by +200 while maximizing swing weight and stability.

Faster Swing Speed: O-ports reduce aerodynamic drag, creating a fast and maneuverable frame with a lightweight feel for accelerated swing speeds enabling players to reach more shots and rip more winners than ever before.

Sweet Zone Power: Ektelon replaced traditional pin-sized string holes with revolutionary giant O-ports, providing total string freedom for a livelier response across the entire string bed. This increases the sweet spot, creating a Sweet Zone, which means ultimate power on every shot!

Power Ring 8: The evolution of Power Ring continues with Power Ring 8. By developing a throat area with 8 Power Rings, each main string wraps around it's own independent Power Ring. This allows maximum string resiliency, ultimate shot control and re-stringing is a breeze!

Triple Threat® with Tungsten: All the powerful technology of Triple Threat® with the added benefit of Tungsten for even more stability, power, and control.

Air+™ Comfort Handle: Available only in MORE Performance™ racquets, the clear grip of the Air+ Comfort™ handle reveals four air filled quadrants that move independently for MORE shock absorption and grip ventilation. The red cross dampener quiets frame vibrations for MORE control.

LongBody®: One inch longer than standard length racquets and perfectly balanced, LongBody® racquets add up to 10% more power and as much as 13% more reach to your game.

Greater strength and stability: O³ racquets are created through a one step fusion process that utilizes the strongest structure known to man, the Arch, creating the frames O-Ports. These O-Ports strengthen and stabilize the frame for increased control while reducing torque and arm injuries typically caused by racquets that are too light.